CN107947252B - Terminal and equipment - Google Patents

Abstract

An embodiment of the present invention provides a terminal, including: a charging interface; and the first charging circuit is connected with the charging interface and used for receiving the output voltage of the adapter through the charging interface, and directly loading the output voltage of the adapter at two ends of the multiple battery cells which are connected in series in the terminal to charge the multiple battery cells. According to the embodiment of the invention, on the premise of ensuring the charging speed, the heat productivity in the charging process can be reduced.

Description

Terminals and Equipment

technical field

Embodiments of the present invention relate to the field of electronic devices, and more particularly, to a terminal and a device.

Background technique

Currently, mobile terminals (such as smart phones) are increasingly favored by consumers, but mobile terminals consume a lot of power and need to be charged frequently.

In order to improve the charging speed, a feasible solution is to use a large current to charge the mobile terminal. The larger the charging current, the faster the charging speed of the mobile terminal, but the more serious the heating problem of the mobile terminal.

Therefore, how to reduce the heat generation of the mobile terminal on the premise of ensuring the charging speed is an urgent problem to be solved at present.

SUMMARY OF THE INVENTION

The embodiment of the present invention provides a terminal, which can reduce the heat generation of the terminal on the premise of ensuring the charging speed.

In a first aspect, a terminal is provided, the terminal includes a charging interface and a first charging circuit. The first charging circuit is connected to the charging interface, receives the output voltage of the adapter through the charging interface, and directly loads the output voltage of the adapter on both ends of the multi-cell battery cells connected in series with each other in the terminal, so that the multi-cell battery cells are directly connected to each other. Charge.

With reference to the first aspect, in some implementations of the first aspect, the terminal further includes a step-down circuit and a power supply circuit. A step-down circuit has an input terminal and an output terminal. The input end of the step-down circuit is connected to both ends of the multi-cell battery cells, and is used to convert the total voltage of the multi-cell battery cells into the first voltage V ₁ , where a≤V ₁ ≤b, a represents the minimum working voltage of the terminal, b represents the maximum working voltage of the terminal. The power supply circuit is connected to the output end of the step-down circuit, and supplies power to the terminal based on the first voltage.

With reference to the first aspect, in some implementations of the first aspect, the step-down circuit is a charge pump, and the first voltage is 1/N of the total voltage of the multi-cell battery cells, where N indicates that the multi-cell battery cells contain the number of cells.

With reference to the first aspect, in some implementations of the first aspect, the first charging circuit is further configured to receive an output current of the adapter, where the received output current is pulsating direct current or alternating current.

With reference to the first aspect, in some implementations of the first aspect, the terminal further includes a power supply circuit. The input end of the power supply circuit is connected to both ends of any single cell in the multi-cell cell, and the power supply circuit supplies power to the devices in the terminal based on the voltage of the single cell.

With reference to the first aspect, in some implementations of the first aspect, the terminal further includes an equalization circuit. The equalizing circuit is connected with the multi-section electric cells, and is used for equalizing the voltage between the various electric cells in the multi-section electric cells.

With reference to the first aspect, in some implementations of the first aspect, the first charging circuit may work in a constant current mode.

With reference to the first aspect, in some implementations of the first aspect, the terminal further includes a second charging circuit. The second charging circuit includes a boosting circuit, one end of the boosting circuit is connected to the charging interface, and the other end of the boosting circuit is connected to the multi-cell battery cells. The booster circuit is used for receiving the output voltage of the adapter through the charging interface, boosting the output voltage of the adapter to a second voltage, and loading the second voltage on both ends of the multi-cell battery cells to charge the multi-cell battery cells, wherein, The output voltage of the adapter received by the second charging circuit is less than the total voltage of the multi-cell battery cells, and the second voltage is greater than the total voltage of the multi-cell battery cells.

With reference to the first aspect, in some implementations of the first aspect, the output voltage of the adapter received by the second charging circuit is 5V.

In combination with the first aspect, in some implementations of the first aspect, the first charging circuit may operate in a first charging mode, and the second charging circuit may operate in a second charging mode. The charging speed of the terminal in the first charging mode is greater than the charging speed of the terminal in the second charging mode.

With reference to the first aspect, in some implementations of the first aspect, the charging interface includes a data cable, and the terminal further includes a control unit. The control unit communicates bidirectionally with the adapter via the data cable to control the charging of the multi-cell batteries.

With reference to the first aspect, in some implementations of the first aspect, the control unit is configured to perform the following processing to control the charging of the multi-cell battery cells: perform bidirectional communication with the adapter to determine the charging mode; When the charging mode is to charge the terminal, the control adapter charges the multi-cell battery cells through the first charging circuit; when it is determined to use the second charging mode to charge the terminal, the control adapter charges the multi-cell battery cells through the second charging circuit .

With reference to the first aspect, in some implementations of the first aspect, the control unit is configured to perform the following processing to determine the charging mode: receive a first instruction sent by the adapter, where the first instruction is used to ask the terminal whether to enable the first charging mode; Send a reply instruction of the first instruction to the adapter, where the reply instruction of the first instruction is used to instruct the terminal to agree to enable the first charging mode.

With reference to the first aspect, in some implementations of the first aspect, the control unit is further configured to perform the following processing to control the charging of the multi-cell battery cells: perform bidirectional communication with the adapter to determine the charging voltage of the first charging mode.

With reference to the first aspect, in some implementations of the first aspect, the control unit is configured to perform the following processing to determine the charging voltage of the first charging mode: receive a second instruction sent by the adapter, where the second instruction is used to query the adapter Whether the output voltage of the adapter is suitable as the charging voltage of the first charging mode; send a reply command of the second command to the adapter, wherein the reply command of the second command is used to indicate that the output voltage of the adapter is appropriate, high, or low.

With reference to the first aspect, in some implementations of the first aspect, the control unit is further configured to perform the following process to control the charging of the multi-cell battery cells: perform bidirectional communication with the adapter to determine the charging current of the first charging mode.

With reference to the first aspect, in some implementations of the first aspect, the control unit is further configured to perform the following processing to determine the charging current of the first charging mode: receive a third instruction sent by the adapter, and the third instruction is used to query the terminal for current Supported maximum charging current; send a reply instruction of the third instruction to the adapter, and the reply instruction of the third instruction is used to indicate the maximum charging current currently supported by the terminal, so that the adapter determines the charging in the first charging mode based on the maximum charging current currently supported by the terminal current.

With reference to the first aspect, in some implementations of the first aspect, the control unit is configured to perform the following processing to control the charging of the multi-cell battery cells: in the process of charging using the first charging mode, perform bidirectional communication with the adapter to Adjust the output current of the adapter.

With reference to the first aspect, in some implementations of the first aspect, the control unit is configured to perform the following processing to adjust the output current of the adapter: receive a fourth instruction sent by the adapter, and the fourth instruction is used to inquire about the current Voltage; send a reply command of the fourth command to the adapter, and the reply command of the fourth command is used to indicate the current voltage of the multi-cell battery cells, so that the adapter can adjust the output current output by the adapter according to the current voltage of the multi-cell battery cells.

In the embodiment of the present invention, the first charging circuit is used to directly charge multiple cells, and based on the direct use of the output voltage of the adapter for the charging scheme, the internal battery structure of the terminal is modified, and multiple cells connected in series are introduced. Compared with the single-cell solution, if you want to achieve the same charging speed, the charging current required by the multi-cell battery is 1/N of the charging current required by the single-cell battery (N is the mutual series connection in the terminal. In other words, compared with the single-cell solution, on the premise of ensuring the same charging speed, the present application can greatly reduce the size of the charging current, thereby reducing the heat generated by the terminal during the charging process.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a terminal according to another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

5 is a schematic diagram of waveforms of pulsating direct current (DC) electricity according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

FIG. 10 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

FIG. 11 is a flowchart of a fast charging process according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

First of all, the "terminal" used in the embodiments of the present invention may include, but is not limited to, be configured to be connected via a wired line (eg, via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters, and and/or another communication terminal's) wireless interface to receive/transmit communication signals. A terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and/or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communication System (PCS) terminals that may combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet access , a PDA with a web browser, memo pad, calendar, and/or a global positioning system (GPS) receiver; and conventional laptop and/or palm receivers or other electronic devices including radiotelephone transceivers.

In addition, the "terminal" used in the embodiments of the present invention may further include a power bank, which can be charged by an adapter, thereby storing energy to provide energy for other electronic devices.

In the related art, a mobile terminal usually includes only a single cell, and when a large charging current is used to charge the single cell, the heating phenomenon of the mobile terminal is very serious. In order to ensure the charging speed of the mobile terminal and alleviate the heating phenomenon of the mobile terminal during the charging process, the embodiment of the present invention modifies the battery structure in the mobile terminal, introduces multiple battery cells connected in series with each other, and the The core is charged directly. The embodiment of the present invention will be described in detail below with reference to FIG. 1 .

FIG. 1 is a schematic structural diagram of a terminal according to an embodiment of the present invention. The terminal 10 in FIG. 1 includes a charging interface 11 and a first charging circuit 12 . The first charging circuit 12 is connected to the charging interface 11, receives the output voltage of the adapter through the charging interface 11, and directly loads the output voltage of the adapter on both ends of the multi-cell battery cells 13 connected in series in the mobile terminal. The core 13 is directly charged. In FIG. 1 , two single cells connected in series are shown, but the present invention is not limited thereto, for example, three or more cells may be provided in the circuit as required.

The terms "direct", "direct charging", "direct loading", "direct charging", etc. are used in the text to indicate that the output voltage from the adapter matches the output voltage of the multi-cell cell, or that the output voltage from the adapter can be loaded to Both ends of the multi-cell cell are used for charging without going through voltage conversion.

In the related art, the output voltage of the adapter is not directly loaded on both ends of the battery cell, but needs to be transformed by some conversion circuits, and then the transformed voltage is loaded on both ends of the battery core, which is the battery core. Charge. For example, the output voltage of the adapter is generally 5V. After the mobile terminal receives the 5V output voltage of the adapter, it will first use the Buck circuit to perform step-down conversion, or use the Boost circuit to perform step-up conversion, and then load the converted voltage into the power supply. both ends of the core.

The use of the conversion circuit will cause serious heating of the mobile terminal, and at the same time will cause the loss of the power output by the adapter. In order to solve the heating problem caused by the conversion circuit and reduce the loss of electric energy, the embodiment of the present invention charges the multi-cell battery cells 13 in a direct charging manner through the first charging circuit 12 .

As mentioned above, "direct charging" may refer to directly loading (or directly guiding) the output voltage of the adapter on both ends of the multi-cell battery cells 13 to charge the multi-cell battery cells 13 without going through a conversion circuit in the middle of the output voltage of the adapter. The voltage is converted to avoid energy loss caused by the conversion process. In the process of using the first charging circuit 12 for charging, in order to be able to adjust the charging voltage on the first charging circuit 12, the adapter can be designed as an intelligent adapter, and the conversion circuit for converting the charging voltage is transferred to the adapter. The conversion of the charging voltage is completed by the adapter, which can reduce the burden of the terminal and simplify the realization of the terminal.

Multiple cells

The direct charging solution can reduce the heat generation of the terminal to a certain extent. However, when the output current of the adapter is too large, for example, the output current of the adapter reaches between 5A and 10A, the heating phenomenon of the terminal will still be serious, which may cause potential safety hazards. . In order to ensure the charging speed and further alleviate the heating phenomenon of the terminal, the embodiment of the present invention further transforms the battery structure inside the terminal, and introduces multiple cells connected in series with each other. At the same charging speed, the charging current required by multiple cells is 1/N of the charging current required by a single cell (N is the number of cells connected in series in the terminal). On the premise of the charging speed, the embodiment of the present invention can greatly reduce the size of the charging current, thereby further reducing the heat generation of the terminal during the charging process.

For example, for a 3000mAh single-cell battery, to achieve a charging rate of 3C, a charging current of 9A is required. In order to achieve the same charging speed and reduce the heat generated by the terminal during the charging process, two 1500mAH batteries can be used. It is connected in series to replace the single cell of 3000mAh. In this way, only 4.5A charging current is needed to achieve 3C charging rate, and compared with 9A charging current, the calorific value caused by 4.5A charging current is obvious. lower.

It should be noted that, since the first charging circuit 12 uses the direct charging mode (ie, directly uses the output voltage of the adapter) to charge the multi-cell battery cells 13, the output voltage of the adapter received by the first charging circuit 12 needs to be greater than that of the multi-cell battery cell 13. The total voltage of the core 13. Generally speaking, the working voltage of a single cell is between 3.0V and 4.35V. Taking two cells in series as an example, the output voltage of the adapter can be set to be greater than or equal to 10V.

It should also be noted that the embodiment of the present invention does not specifically limit the type of the charging interface 11, for example, it may be a Universal Serial Bus (Universal Serial Bus, USB) interface or a TYPE-C interface. The USB interface can be an ordinary USB interface or a micro USB interface. The first charging circuit 12 can charge the multi-cell battery cells 13 through the power line in the USB interface, wherein the power line in the USB interface can be the VBus line and/or the ground line in the USB interface.

The embodiment of the present invention does not specifically limit the type of the terminal, for example, it may be a mobile terminal such as a mobile phone and a pad, or other devices such as medical equipment and equipment related to the financial industry.

The multi-section battery cells 13 in the embodiment of the present invention may be cells with the same or similar specifications and parameters. The cells with the same or similar specifications are convenient for unified management, and the selection of cells with the same or similar specifications and parameters can improve the multi-section power consumption. The overall performance and service life of the core 13.

It should be understood that the multiple cells 13 connected in series can divide the output voltage of the adapter.

At present, the terminal (or the device in the terminal, or the chip in the terminal) is powered by a single cell. The embodiment of the present invention introduces multiple cells connected in series with each other. The total voltage of the multiple cells is relatively high, which is not suitable for direct Used to power the terminal (or the device in the terminal, or the chip in the terminal). In order to solve this problem, a feasible implementation method is to adjust the working voltage of the terminal (or the device in the terminal, or the chip in the terminal) so that it can support the power supply of multiple cells. The larger the change, the higher the cost. 2 and 3, the implementation manner according to the embodiment of the present invention will be described in detail, so as to solve the problem of how to supply power in the multi-cell solution.

Power supply based on multiple cells

Optionally, in some embodiments, as shown in FIG. 2 , the terminal 10 may further include a step-down circuit 21 and a power supply circuit 22 . The input end of the step-down circuit 21 is connected to both ends of the multi-cell battery cells 13, and is used for converting the total voltage of the multi-cell battery cells 13 into the first voltage V ₁ , where a≤V ₁ ≤b, and a represents the terminal 10 ( or the minimum operating voltage of the device in the terminal 10, or the chip in the terminal 10), and b represents the maximum operating voltage of the terminal 10 (or the device in the terminal 10, or the chip in the terminal 10). The power supply circuit 22 is connected to the output end of the step-down circuit 21, and supplies power to the terminal 10 based on the first voltage.

On the basis of the embodiment described in FIG. 1 , the embodiment of the present invention introduces the step-down circuit 21 shown in FIG. 2 . When the terminal is in the working state, the total voltage of the multi-cell battery cells 13 will first be stepped down through the step-down circuit 31 to obtain the first voltage. Since the first voltage is between the minimum working voltage and the maximum working voltage of the terminal 10, it can be It is directly used to supply power to the terminal, which solves the problem of how to supply power in the multi-cell solution.

It should be noted that the total voltage of the multi-cell battery cells 13 changes with the change of the power of the multi-cell battery cells 13 . Therefore, the total voltage of the multi-cell battery cells 13 above may refer to the voltage of the multi-cell battery cells 13 . Current total voltage. For example, the working voltage of a single cell can be between 3.0V and 4.35V. Assuming that a multi-cell cell includes two cells, and the current voltage of both cells is 3.5V, then the multi-cell cell above The total voltage of the core 13 is 7V.

Taking the working voltage range of a single cell as an example, a=3.0V, b=4.35V, in order to ensure the normal power supply voltage of the devices in the terminal, the step-down circuit 21 can The total voltage of the battery saver 13 drops to any value in the range of 3.0V-4.35V. The step-down circuit 21 can be implemented in many ways, for example, the step-down circuit can be realized by adopting a Buck circuit, a charge pump and other circuit forms.

It should be noted that the step-down circuit 21 may be a charge pump, and through the charge pump, the total voltage of the multi-cell battery cells 13 can be directly reduced to 1/N of the current total voltage, where N represents that the multi-cell battery cells 13 contain the number of cells. The traditional Buck circuit includes devices such as switches and inductors, and the loss of the inductors is relatively large. Therefore, the use of the Buck circuit to reduce the voltage will lead to a relatively large power loss of the multi-section battery cells 13 . Compared with the Buck circuit, the charge pump mainly uses the switch tube and the capacitor to reduce the voltage, and the capacitor basically does not consume additional energy. Therefore, the use of the charge pump can reduce the circuit loss caused by the step-down process. Specifically, the switch tube inside the charge pump controls the charging and discharging of the capacitor in a certain way, so that the input voltage is reduced by a certain factor (the factor selected in the embodiment of the present invention is 1/N) to obtain the required voltage.

Optionally, in other embodiments, as shown in FIG. 3 , the terminal 10 may further include a power supply circuit 32 . Compared with the structure shown in FIG. 2 , in FIG. 3 , the step-down circuit is removed, and the power supply circuit 32 can be directly connected to the multi-cell cells. For example, the input terminal of the power supply circuit 32 (for example, two input terminals are shown in the figure, the two input terminals can be set separately or can be set together) and the input terminal of any single cell in the multi-cell battery 13 Both ends are connected, and the power supply circuit 32 supplies power to the devices in the terminal 10 based on the voltage of the single cell 13 .

It should be understood that ripples may appear in the voltage after the step-down processing by the step-down circuit, thereby affecting the power supply quality of the terminal. In the embodiment of the present invention, the power supply voltage is directly drawn from both ends of a single cell in the multi-cell cell to supply power to the device in the terminal. Since the voltage output by the cell is relatively stable, the embodiment of the present invention is While solving the problem of how to supply power under the multi-cell solution, it can maintain the power supply quality of the terminal.

Further, on the basis of the embodiment in FIG. 3 , as shown in FIG. 4 , the terminal 10 may further include an equalization circuit 33 . The equalization circuit 33 is connected to the multi-section cells 13 for equalizing the voltages between the cells in the multi-section cells 13 .

After the power supply method shown in Figure 3 is adopted, the battery cells that supply power to the devices in the terminal (hereinafter referred to as the main battery cells, and the remaining cells are referred to as secondary cells) will continue to consume power, resulting in the gap between the main battery cell and the secondary battery cells. The voltage imbalance between the multi-section cells 13 will reduce the overall performance of the multi-section cells 13 and affect the service life of the multi-section cells 13. Moreover, the multi-section cells 13 The unbalanced voltage between the cells will make it difficult to manage the multi-cell cells 13 in a unified manner. Therefore, the embodiment of the present invention introduces an equalization circuit 33 to balance the voltages between the cells in the multi-cell cells 13 , thereby improving the multi-cell voltage. The overall performance of the battery cells 13 facilitates unified management of the multi-section battery cells 13 .

The balancing circuit 33 can be implemented in many ways. For example, a load can be connected at both ends of the slave cells to consume the power of the slave cells and keep them consistent with the power of the master cells, so that the voltages of the master cells and the slave cells can be maintained. Consistent. Alternatively, a slave cell can be used to charge the master cell until the voltages of the master cell and the slave cell are the same.

As the output power of the adapter increases, when the adapter charges the battery cells in the terminal, it is easy to cause lithium precipitation of the battery cells, thereby reducing the service life of the battery cells.

In one embodiment, the first charging circuit 12 can also be used to receive the output current of the adapter. In order to improve the reliability and safety of the cell, in some embodiments, the adapter can be controlled to output pulsating direct current (or unidirectional pulsating output current, or pulsating waveform current, or steamed bun wave current), because the first The charging circuit 12 adopts the direct charging mode, and the pulsating DC power output by the adapter can be directly loaded into the two ends of the multi-cell battery cells 13. As shown in FIG. 5, the current size of the pulsating DC power changes periodically. Reduce the lithium precipitation phenomenon of lithium batteries and improve the service life of the batteries. In addition, compared with constant current, pulsating direct current can reduce the probability and intensity of arcing of the contacts of the charging interface, and improve the life of the charging interface.

There are many ways to set the output current of the adapter to pulsating DC. For example, the secondary filter circuit in the adapter can be removed, and the output current of the secondary rectifier circuit (the output current of the rectifier circuit is the pulsating DC) can be directly used as the adapter. output current.

Similarly, in some embodiments, the output voltage of the adapter received by the first charging circuit 12 is a pulsating waveform voltage, and the pulsating waveform voltage may also be referred to as a unidirectional pulsating output voltage, or a steamed bread wave voltage.

Optionally, in some embodiments, the output current of the adapter received by the first charging circuit 12 may also be alternating current (for example, the adapter does not need to be rectified and filtered, and the mains is directly stepped down and then output), and the alternating current can also be used. Reduce the lithium precipitation phenomenon of lithium batteries and improve the service life of the batteries.

Optionally, in some embodiments, the first charging circuit 12 may operate in a constant current mode. It should be understood that the constant current mode means that the charging current remains constant for a period of time, and does not mean that the charging current remains constant all the time. In practice, in the constant current mode, the first charging circuit 12 can adjust the charging current corresponding to the constant current mode in real time according to the current voltages of the plurality of cells, so as to realize the segmented constant current. Further, if the output current of the adapter received by the first charging circuit 12 is pulsating direct current, the first charging circuit 12 can operate in a constant current mode, which means that the peak value of the pulsating direct current or the average value of the pulsating direct current remains constant for a period of time. If the output current of the adapter received by the first charging circuit 12 is alternating current, the charging mode of the first charging circuit 12 being the constant current mode may mean that the peak value or average value of the forward current of the alternating current remains constant for a period of time.

Optionally, in some embodiments, as shown in FIG. 6 , multiple cells 13 may be jointly packaged in a battery 51 , and further, the battery 51 may further include a battery protection board 52 , and the battery protection board 52 may Realize overvoltage/overcurrent protection, power balance management, power management and other functions.

Second charging circuit and device including second charging circuit

Optionally, in some embodiments, as shown in FIG. 7 , the terminal 10 may further include a second charging circuit 61 . The second charging circuit 61 is connected in parallel with the first charging circuit 12 . The second charging circuit 61 is connected between the charging interface 11 and the multi-cell battery cells 13 , that is, one end of the second charging circuit 61 is connected to the charging interface, and the other end is connected to the multi-cell battery cells 13 .

Further, as shown in FIG. 8 , an embodiment of the present invention further provides a device having a structure similar to that in FIG. 7 . 8 , the device according to the embodiment of the present invention has: a charging interface 11 , a battery unit 15 , a first charging circuit 12 , and a second charging circuit 61 . The battery unit 15 includes a plurality of battery cells connected in series. The first charging circuit 12 is connected to the charging interface 11 for receiving the output voltage from the charging device via the charging interface 11 and directly applying the output voltage to both ends of the battery unit 15 for charging the plurality of cells. The second charging circuit 61 is connected in parallel with the first charging circuit 12, and is used for receiving the output voltage from the charging device (eg, an adapter or power adapter, mobile power supply, power bank, etc.) via the charging interface 11, and boosting the output voltage , and the boosted output voltage is applied to both ends of the battery unit 15 for charging a plurality of cells.

As an example, the first charging circuit 12 may work in the first charging mode, the second charging circuit 61 may work in the second charging mode, and the charging speed of the device in the first charging mode is greater than the charging speed of the device in the second charging mode .

As shown in FIG. 9 , the second charging circuit 61 shown in FIG. 7 or FIG. 8 includes a booster circuit 62 . One end of the booster circuit 62 is connected to the charging interface 11 , and the other end of the booster circuit 62 is connected to the multi-cell battery cells 13 . The booster circuit 62 receives the output voltage of the adapter through the charging interface 11 , boosts the output voltage of the adapter to a second voltage, and applies the second voltage to both ends of the multi-cell battery cells 13 to charge the multi-cell battery cells. The output voltage of the adapter received by the second charging circuit 61 is lower than the total voltage of the multi-cell battery cells, and the second voltage is greater than the total voltage of the multi-cell battery cells 13 .

It can be seen from the above that the first charging circuit 12 directly charges the multi-cell battery cells 13, and this charging method requires the output voltage of the adapter to be higher than the total voltage of the multi-cell battery cells 13. For example, for the scheme in which two battery cells are connected in series For example, assuming that the current voltage of each cell is 4V, when using the first charging circuit 12 to charge the two cells, the output voltage of the adapter is required to be at least 8V. However, the output voltage of an ordinary adapter is generally 5V. The ordinary adapter cannot charge the multi-cell battery cells 13 through the first charging circuit 12. In order to be compatible with the charging mode provided by the ordinary adapter, a second charging circuit 61 is introduced in the embodiment of the present invention. The voltage circuit can increase the output voltage of the adapter to the second voltage, which is greater than the total voltage of the multi-cell cells 13 , thereby solving the problem that the ordinary adapter cannot charge the multi-cell cells 13 connected in series.

It should be noted that the embodiment of the present invention does not specifically limit the voltage value of the output voltage of the adapter received by the second charging circuit 61 , as long as the output voltage of the adapter is lower than the total voltage of the multi-cell battery cells 13 , the second charging circuit 61 can After the charging circuit 61 boosts the voltage, it charges the multi-cell battery cells 13 .

It should also be noted that the embodiment of the present invention does not limit the specific form of the boosting circuit. For example, a boosting circuit may be used, or a charge pump may be used for boosting. Optionally, in some embodiments, the second charging circuit 61 can adopt a traditional charging circuit design method, that is, a charging management chip is arranged between the charging interface and the battery cell, and the charging management chip can perform constant voltage on the charging process. , constant current control, and adjust the output voltage of the adapter according to actual needs, such as boosting or bucking, the embodiment of the present invention can use the boosting function of the charging management chip to boost the output voltage of the adapter to a level higher than that of the multi-section The second voltage of the total voltage of the cells 13 . It should be understood that the switching between the first charging circuit 12 and the second charging circuit 61 can be realized by a switch or a control unit, for example, a control unit is provided inside the terminal, and the control unit can be set in the first Flexible switching between a charging circuit 12 and a second charging circuit 61 is performed.

Quick Charge Mode and Normal Charge Mode

Optionally, in some embodiments, the first charging circuit 12 may work in a first charging mode, also referred to as a fast charging mode, and the second charging circuit 61 may work in a normal charging mode, also referred to as a normal charging mode. The charging speed of the terminal in the fast charging mode is greater than the charging speed of the terminal in the normal charging mode, for example, the charging current of the fast charging mode is greater than the charging current of the normal charging mode. For example, the normal charging mode can be understood as a charging mode with a rated output voltage of 5V and a rated output current less than or equal to 2.5A; the fast charging mode can be understood as a high-current charging mode, and the charging current in the fast charging mode can be higher than 2.5A , for example, it can reach 5-10A, and the fast charging mode adopts the direct charging mode, that is, the output voltage of the adapter is directly loaded to both ends of the battery cell.

Further, as shown in FIG. 10 , the charging interface 11 may include a data cable (not shown in the figure), and the terminal 10 may further include a control unit 71 , and the control unit 71 may perform bidirectional communication with the adapter through the data cable to control multiple battery cells The charging process of the core 13. Taking the charging interface as the USB interface as an example, the data line may be the D+ line and/or the D- line in the USB interface.

The embodiment of the present invention does not specifically limit the communication content between the control unit 71 and the adapter, and the control method of the control unit for the charging process of the multi-cell battery cells 13. For example, the control unit 71 can communicate with the adapter to interact with the multi-cell battery cells 13 Current voltage or current power to control the adapter to adjust the output voltage or output current. For another example, the control unit 71 may communicate with the adapter to exchange the current state of the terminal to negotiate which charging circuit of the first charging circuit 12 and the second charging circuit 61 is used for charging.

The communication content between the control unit 71 and the adapter, and the control manner of the charging process by the control unit 71 will be described in detail below with reference to specific embodiments.

Embodiment 1

Optionally, in some embodiments, the control unit 71 performs bidirectional communication with the adapter through a data cable to control the charging process of the multi-cell battery cells 13 may include: the control unit 71 performs bidirectional communication with the adapter to determine the charging mode; When it is determined to use the fast charging mode to charge the terminal, the control unit 71 controls the adapter to charge the multi-cell battery cells 13 through the first charging circuit 12; The second charging circuit 61 charges the multi-cell battery cells 13 .

In the embodiment of the present invention, the terminal does not blindly perform fast charging through the first charging circuit, but performs bidirectional communication with the adapter to negotiate whether the fast charging mode can be used, which can improve the safety of the fast charging process.

For example, the control unit 71 performs two-way communication with the adapter to determine the charging mode may include: the control unit 71 receives a first instruction sent by the adapter, where the first instruction is used to ask the terminal whether to enable the fast charging mode; the control unit 71 sends a first instruction to the adapter The reply instruction of the instruction, the reply instruction of the first instruction is used to instruct the terminal to agree to turn on the fast charging mode.

Embodiment 2

Optionally, in some embodiments, the control unit 71 conducts bidirectional communication with the adapter through a data cable to control the charging process of the multi-cell battery cells 13 may include: the control unit 71 communicates with the adapter bidirectionally to determine a Charging voltage.

For example, the two-way communication between the control unit 71 and the adapter to determine the charging voltage in the fast charging mode may include: the control unit 71 receives a second instruction sent by the adapter, where the second instruction is used to inquire whether the current output voltage of the adapter is suitable for fast charging The charging voltage of the mode; the control unit 71 sends a reply command of the second command to the adapter, and the reply command of the second command is used to indicate that the current voltage is appropriate, high or low. Optionally, the second command is used to inquire whether the current voltage output by the adapter matches the current voltage of the multi-cell battery cells 13, and the reply command of the second command indicates that the current voltage output by the adapter matches the current voltage of the multi-cell battery cells 13, high or low.

Embodiment 3

Optionally, in some embodiments, the control unit 71 conducts bidirectional communication with the adapter through a data cable to control the charging process of the multi-cell battery cells 13 may include: the control unit 71 communicates with the adapter bidirectionally to determine a recharging current.

For example, the two-way communication between the control unit 71 and the adapter to determine the charging current in the fast charging mode may include: the control unit 71 receives a third instruction sent by the adapter, where the third instruction is used to inquire about the maximum charging current currently supported by the terminal; the control unit 71 A reply instruction of the third instruction is sent to the adapter, where the reply instruction of the third instruction is used to indicate the maximum charging current currently supported by the terminal, so that the adapter determines the charging current of the fast charging mode based on the maximum charging current currently supported by the terminal. The adapter can determine the maximum charging current currently supported by the terminal as the charging current in the fast charging mode, or can determine the charging current in the fast charging mode after comprehensively considering factors such as the maximum charging current currently supported by the terminal and its own current output capability.

Embodiment 4

Optionally, in some embodiments, the control unit 71 performs bidirectional communication with the adapter through a data cable, so as to control the charging process of the multi-cell battery cells 13 , which may include: during the charging process using the fast charging mode, the control unit 71 communicates with the adapter Two-way communication to adjust the output current of the adapter.

For example, the two-way communication between the control unit 71 and the adapter to adjust the output current of the adapter may include: the control unit 71 receives a fourth instruction sent by the adapter, where the fourth instruction is used to inquire about the current voltage of the multi-cell battery cells 13; The adapter sends a reply command of the fourth command, and the reply command of the fourth command is used to indicate the current voltage of the multi-cell battery cells 13 , so that the adapter can adjust the charging current output by the adapter according to the current voltage of the multi-cell battery cells 13 .

Optionally, as an embodiment, the control unit 71 sends a reply instruction of the fourth instruction to the adapter, and the reply instruction of the fourth instruction is used to indicate the current voltage of the multi-cell battery cells 13, so that the adapter can respond according to the current voltage of the multi-cell battery cells 13. voltage, and adjusting the charging current output by the adapter may include: the control unit 71 receives a fourth instruction sent by the adapter, and the fourth instruction is used to inquire about the current voltage of the multi-cell battery cells 13; the control unit 71 sends a reply instruction of the fourth instruction to the adapter, The reply command of the fourth command is used to indicate the current voltage of the multi-cell battery cells 13 , so that the adapter can continuously adjust the output current of the adapter according to the current voltage of the multi-cell battery cells 13 .

Embodiment 5

Optionally, as an embodiment, when the adapter uses the fast charging mode to charge the multi-cell battery cells 13 , the control unit 71 performs bidirectional communication with the adapter, so that the adapter determines whether the charging interface is in poor contact.

For example, the control unit 71 performs bidirectional communication with the adapter, so that the adapter determines whether the charging interface is in poor contact, which may include: the control unit 71 receives a fourth instruction sent by the adapter, and the fourth instruction is used to inquire about the current voltage of the multi-cell battery cells 13; the control unit 71 sends a reply command of the fourth command to the adapter, and the reply command of the fourth command is used to indicate the current voltage of the multi-cell battery cells 13, so that the adapter can determine the charging interface 11 according to the output voltage of the adapter and the current voltage of the multi-cell battery cells 13 Whether the contact is poor.

Optionally, as an embodiment, the control unit 71 is further configured to receive a fifth instruction sent by the adapter, where the fifth instruction is used to indicate that the charging interface 11 is in poor contact.

The communication process between the terminal and the adapter will be described in more detail below with reference to specific examples. It should be noted that the example in FIG. 11 is only for helping those skilled in the art to understand the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to specific numerical values or specific scenarios exemplified. According to the example shown in FIG. 11 , those skilled in the art can obviously make various equivalent modifications or changes, and such modifications or changes also fall within the scope of the embodiments of the present invention.

Charging process based on fast charging mode

As shown in Figure 11, the fast charging process can consist of five stages:

Phase 1:

After the control unit 71 is connected to the power supply device, the terminal can detect the type of the power supply device through the data lines D+ and D-. When it is detected that the power supply device is an adapter, the current absorbed by the terminal can be greater than the preset current threshold I2 ( For example, it can be 1A). When the adapter detects that the output current of the adapter is greater than or equal to I2 for a preset period of time (for example, it can be continuous T1 time), the adapter can consider that the terminal has completed the type identification of the power supply device, and the adapter turns on the connection between the adapter and the control unit 71. The handshake communication between the two, sending command 1 (corresponding to the above-mentioned first command) to the control unit 71 to ask the control unit 71 whether to enable the fast charging mode (or called the flash charging mode).

When the adapter receives the reply command of Command 1 sent by the control unit 71, and the reply command of Command 1 indicates that the control unit 71 does not agree to turn on the fast charging mode, the adapter detects its own output current again. When the output current of the adapter is at the preset value When it is still greater than or equal to I2 within the continuous period of time (for example, it can be continuous T1 time), command 1 is sent to the control unit 71 again to ask the control unit 71 whether to enable the fast charging mode. The adapter repeats the above steps of Phase 1 until the control unit 71 agrees to turn on the fast charging mode, or the output current of the adapter no longer satisfies the condition of being greater than or equal to I2.

After the control unit 71 agrees to enable the fast charging mode, the fast charging process is started, and the fast charging communication process enters the second stage.

Stage 2:

The output voltage of the adapter may include multiple gears (ie, levels), and the adapter sends a command 2 (corresponding to the second command above) to the control unit 71 to inquire whether the current voltage output by the adapter is suitable as a charging voltage in the fast charging mode ( Or, instruction 2 inquires whether the current voltage output by the adapter matches the current voltage of the multi-cell battery 13).

The control unit 71 sends a reply instruction of instruction 2 to the adapter to indicate that the current voltage output by the adapter is appropriate, high, or low. For example, when the reply instruction of instruction 2 indicates that the current voltage output by the adapter is high or low, the adapter can The current voltage output by the adapter is adjusted by one gear, and the command 2 is sent to the control unit 71 again to re-inquire whether the current voltage output by the adapter is suitable as the charging voltage in the fast charging mode. The above steps in stage 2 are repeated until the control unit 71 determines that the current voltage output by the adapter is suitable as the charging voltage in the fast charging mode, and the third stage is entered.

Stage 3:

The adapter sends command 3 (corresponding to the third command above) to the control unit 71 to inquire about the maximum charging current currently supported by the control unit 71, and the control unit 71 sends a reply command of command 3 to the adapter to indicate the current maximum charging current supported by the terminal, and enter stage 4.

Stage 4:

The adapter determines the charging current of the fast charging mode according to the maximum charging current currently supported by the terminal, and then enters stage 5, that is, the constant current stage.

Stage 5:

After entering the constant current stage, the adapter sends command 4 (corresponding to the above-mentioned fourth command) to the control unit 71 at regular intervals to inquire about the current voltage of the multi-cell battery cells 13, and the control unit 71 can send a reply command of command 4 to the adapter. , to feed back the current voltage of the multi-cell battery cells 13 , and the adapter can judge whether the contact of the charging interface is good and whether the output current of the adapter needs to be reduced according to the current voltage of the multi-cell battery cells 13 . When the adapter judges that the contact of the charging interface is poor, it can send command 5 (corresponding to the fifth command above) to the control unit 71 , and then reset to re-enter stage 1 .

Optionally, in some embodiments, in phase 1, when the control unit 71 sends a reply instruction of instruction 1, the reply instruction of instruction 1 may carry the data (or information) of the path impedance of the terminal, the path impedance of the terminal. The data can be used in Phase 5 to determine whether the contact of the charging interface is good.

Optionally, in some embodiments, in stage 2, the time from the terminal agreeing to start the fast charging mode to the adapter adjusting the output voltage to a suitable voltage can be controlled within a certain range, if the time exceeds the predetermined range , the control unit 71 may determine that the fast charging communication process is abnormal, and reset to re-enter stage 1.

Optionally, in some embodiments, in stage 2, when the current voltage output by the adapter is higher than the current voltage of the multi-cell battery cells 13 by ΔV (ΔV can be set to 200-500mV), the control unit 71 sends a message to the adapter. Reply to command 2 to indicate that the current voltage output by the adapter is appropriate.

Optionally, in some embodiments, in stage 4, the adjustment speed of the output current of the adapter can be controlled within a certain range, so as to avoid abnormal charging process of the first charging circuit 12 caused by too fast adjustment speed.

Optionally, in some embodiments, in stage 5, the variation range of the output current of the adapter can be controlled within 5%.

Optionally, in some embodiments, in stage 5, the adapter can monitor the path impedance of the first charging circuit 12 in real time. The current voltage of the battery cell 13 monitors the path impedance of the first charging circuit 12 . When the path impedance of the first charging circuit 12 > the path impedance of the terminal + the impedance of the charging cable, it can be considered that the charging interface is in poor contact, and charging using the first charging circuit 12 is stopped.

Optionally, in some embodiments, after the fast charging mode is enabled, the communication time interval between the adapter and the control unit 71 can be controlled within a certain range, so as to avoid an abnormal fast charging communication process caused by a short communication interval.

Optionally, in some embodiments, the stop of the fast charging process (or the stop of the fast charging mode) can be divided into two types: recoverable stop and non-recoverable stop:

For example, when it is detected that the multi-cell battery 13 is fully charged or the charging interface is in poor contact, the fast charging process stops, the fast charging communication process is reset, and re-enters stage 1, the terminal does not agree to enable the fast charging mode, and the fast charging communication process does not enter stage 2 , the stop of the fast charging process in this case can be regarded as an unrecoverable stop.

For another example, when a communication abnormality occurs between the control unit 71 and the adapter, the fast charging process is stopped, the fast charging communication process is reset, and the stage 1 is re-entered. After the requirements of stage 1 are met, the control unit 71 agrees to turn on the fast charging mode to resume. The fast charging process, the stop of the fast charging process in this case can be regarded as a recoverable stop.

For another example, when the control unit 71 detects that a certain cell in the multi-cell battery cells 13 is abnormal, the fast charging process is stopped, the fast charging communication process is reset, and the stage 1 is re-entered. The control unit 71 does not agree to enable the fast charging mode, When the multi-cell cells 13 return to normal and meet the requirements of Phase 1, the control unit 71 agrees to enable the fast charging mode, and the stop of the fast charging process in this case can be regarded as a recoverable stop.

It should be noted that the above communication steps or operations shown in FIG. 11 are only examples. For example, in Phase 1, after the terminal and the adapter are connected, the handshake communication between the control unit 71 and the adapter can also be controlled by The unit 71 initiates, that is, the control unit 71 sends the command 1 to ask the adapter whether to turn on the fast charging mode. When the control unit 71 receives the reply command from the adapter indicating that the adapter agrees to turn on the fast charging mode, the first charging circuit 12 is used for the multi-cell battery 13. Charge.

It should be noted that the above communication steps or operations shown in FIG. 11 are only examples. For example, after stage 5, a constant voltage charging stage may also be included, that is, in stage 5, the control unit 71 may report to the adapter Feedback the current voltage of the multi-cell battery cells 13, when the current voltage of the multi-cell battery cells 13 reaches the constant voltage charging voltage threshold, the charging stage is transferred from the constant current stage to the constant voltage stage, and in the constant voltage stage, the charging current gradually decreases , and stop charging when the current drops to a certain threshold, indicating that the multi-cell battery cells 13 have been fully charged.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the related technology or the part of the technical solution. The computer software product is stored in a storage medium, including several The instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Claims (18)

1. a terminal, is characterized in that, comprises: charging interface; A first charging circuit, the first charging circuit is connected with the charging interface, and is used for receiving the output voltage of the adapter through the charging interface, and directly loading the output voltage of the adapter on the series-connected terminals in the terminal. Both ends of the multi-cell battery cells charge the multi-cell battery cells, wherein the first charging circuit charges the multi-cell battery cells through the power cord in the charging interface, and the multi-cell battery cells have the same specifications and parameters. Batteries; A second charging circuit, the second charging circuit includes a boosting circuit, one end of the boosting circuit is connected to the charging interface, and the other end is connected to the multi-cell battery cells, and the boosting circuit is used to pass the The charging interface receives the output voltage of the adapter, boosts the output voltage of the adapter to a second voltage, and loads the second voltage on both ends of the multi-cell battery cells, which is the Battery-saving cell charging, wherein the output voltage of the adapter received by the second charging circuit is less than the total voltage of the multi-cell battery cells, and the second voltage is greater than the total voltage of the multi-cell battery cells , wherein the output voltage of the adapter received by the second charging circuit is lower than the output voltage of the adapter received by the first charging circuit; The first charging circuit works in the first charging mode, the second charging circuit works in the second charging mode, and the charging speed of the terminal in the first charging mode is faster than that in the second charging mode. The charging speed of the charging mode, wherein the first charging mode is a fast charging mode, the second charging mode is a normal charging mode, and the charging current of the quick charging mode is greater than the charging current of the normal charging mode. 2. The terminal of claim 1, further comprising: a step-down circuit, having an input terminal and an output terminal, wherein the input terminal is connected to both ends of the multi-cell battery cells, and is used for converting the total voltage of the multi-cell battery cells into a first voltage V ₁ , wherein a≤V ₁ ≤b, a represents the minimum operating voltage of the terminal, and b represents the maximum operating voltage of the terminal; A power supply circuit, connected to the output terminal of the step-down circuit, supplies power to the terminal based on the first voltage. 3 . The terminal according to claim 2 , wherein the step-down circuit is a charge pump, and the first voltage is 1/N of the total voltage of the multi-cell cells, wherein N represents the multi-cell voltage. 4 . The number of cells contained in the battery saver. 4. The terminal according to any one of claims 1-3, wherein the first charging circuit is further configured to receive an output current of the adapter, and the received output current is a pulsating direct current or alternating current . 5 . The terminal according to claim 1 , wherein the first charging circuit operates in a constant current mode. 6 . 6. The terminal of claim 1, wherein the output voltage of the adapter received by the second charging circuit is 5V. 7. The terminal of claim 1, wherein the charging interface comprises a data cable, the terminal further comprises a control unit, and the control unit is configured to perform bidirectional communication with the adapter via the data cable, to control the charging of the multi-cell battery cells. 8. The terminal according to claim 7, wherein the control unit is configured to perform the following processing to control the charging of the multi-cell battery cells: two-way communication with the adapter to determine the charging mode; In the case of determining that the terminal is charged by the first charging mode, controlling the adapter to charge the multi-cell battery cells through the first charging circuit; and In the case that it is determined to use the second charging mode to charge the terminal, the adapter is controlled to charge the multi-cell battery cells through the second charging circuit. 9. The terminal of claim 8, wherein the control unit is configured to perform the following processing to determine the charging mode: receiving a first instruction sent by the adapter, where the first instruction is used to ask the terminal whether to enable the first charging mode; and Send a reply instruction of the first instruction to the adapter, where the reply instruction of the first instruction is used to instruct the terminal to agree to enable the first charging mode. 10. The terminal according to any one of claims 7-9, wherein the control unit is further configured to perform the following processing to control the charging of the multi-cell battery cells: Bidirectional communication with the adapter to determine a charging voltage for the first charging mode. 11. The terminal of claim 10, wherein the control unit is configured to perform the following processing to determine the charging voltage of the first charging mode: receiving a second instruction sent by the adapter, where the second instruction is used to inquire whether the output voltage of the adapter is suitable as the charging voltage of the first charging mode; and Send a reply command of the second command to the adapter, where the reply command of the second command is used to indicate that the output voltage is appropriate, high, or low. 12. The terminal according to any one of claims 7-9, wherein the control unit is further configured to perform the following processing to control the charging of the multi-cell battery cells: Bidirectional communication with the adapter to determine a charging current for the first charging mode. 13. The terminal according to claim 12, wherein the control unit is configured to perform the following processing to determine the charging current of the first charging mode: receiving a third instruction sent by the adapter, where the third instruction is used to inquire about the current maximum charging current supported by the terminal; and Sending a reply instruction of the third instruction to the adapter, where the reply instruction of the third instruction is used to indicate the maximum charging current currently supported by the terminal, so that the adapter determines based on the maximum charging current currently supported by the terminal The charging current of the first charging mode. 14. The terminal according to any one of claims 7-9, wherein the control unit is configured to perform the following processing to control the charging of the multi-cell battery cells: During charging using the first charging mode, bidirectional communication is performed with the adapter to adjust the output current of the adapter. 15. The terminal of claim 14, wherein the control unit is configured to perform the following processing to adjust the output current of the adapter: receiving a fourth instruction sent by the adapter, where the fourth instruction is used to query the current voltage of the multi-cell battery cells; and Send a reply instruction of the fourth instruction to the adapter, where the reply instruction of the fourth instruction is used to indicate the current voltage of the multi-cell battery cells, so that the adapter, according to the current voltage of the multi-cell battery cells, Adjust the output current of the adapter. 16. The terminal of claim 1, further comprising: A power supply circuit, the input end of the power supply circuit is connected to both ends of any single-cell cell in the multi-cell cell, and the power supply circuit is used for generating the voltage in the terminal based on the voltage of the single-cell cell device power supply. 17. The terminal of claim 16, further comprising: An equalizing circuit, connected to the multi-section electric cells, is used to equalize the voltages between the cells in the multi-section electric cells. 18. An electronic device, characterized in that, comprising: charging interface; A battery unit, comprising a plurality of cells connected in series, the plurality of cells are cells with the same specifications and parameters; a first charging circuit, connected to a charging interface, for receiving an output voltage from a charging device via the charging interface and directly applying the output voltage to both ends of the battery unit, for charging the plurality of cells to charge; and A second charging circuit, connected in parallel with the first charging circuit, is configured to receive the output voltage from the charging device via the charging interface, boost the output voltage, and convert the boosted output voltage The output voltage is applied to both ends of the battery unit for charging the plurality of battery cells, wherein the output voltage of the adapter received by the second charging circuit is lower than that received by the first charging circuit. the output voltage of the adapter; Wherein, the first charging circuit works in the first charging mode, the second charging circuit works in the second charging mode, and the charging speed of the electronic device in the first charging mode is faster than that in the electronic device in the The charging speed of the second charging mode, wherein the first charging mode is a fast charging mode, the second charging mode is a normal charging mode, and the charging current of the quick charging mode is greater than the charging current of the normal charging mode.

Images